:root {
    --bg: #f6f8fb;
    --surface: #ffffff;
    --line: #d9e1ec;
    --text: #1d2a3b;
    --muted: #5b6b80;
    --accent: #0b63ce;
    --accent-hover: #0953ac;
    --radius: 12px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
}

.app-shell {
    max-width: 980px;
    margin: 0 auto;
    min-height: 100vh;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-mark {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: var(--accent);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.82rem;
}

.brand-mark svg {
    width: 16px;
    height: 16px;
    display: block;
}

.brand-copy {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.brand-copy strong {
    font-size: 0.98rem;
}

.brand-copy span {
    font-size: 0.82rem;
    color: var(--muted);
}

.panel-link {
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
}

.panel-link:hover {
    color: var(--accent-hover);
}

@media (max-width: 720px) {
    .top-bar {
        flex-direction: column;
        align-items: flex-start;
    }
}